"The greatest danger for our future is apathy."

"We are very, very small, but we are capable of understanding the universe."

"I think [contacting an alien civilization] would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet…"

"Intelligence is the ability to adapt to change."

"My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all."